I see investing in the Telegram project as much more profitable than investing in the Libra project. Telegram has already been giving its users privacy using the science of cryptography from the very beginning.
But still, Telegram's structure is not 100% decentralized in some way. I hope the company will build a completely decentralized infrastructure and maximise user privacy.
Because I hear telegram has raised millions of dollars in investments. I hope they will use that investment effectively and integrate more into the blockchain infrastructure.
Someone above wrote about centralization.
The structure of the messenger is centralized, by itself.
But the addresses in the TON blockchain will be like everywhere else - only the owner has access to the private key.
And even if for some reason your Telegram account is blocked, this will not affect the address. You can get there by private key through any compatible wallet.